The IESG has received a request from the Session Initiation Protocol Core WG (sipcore) to consider the following document: - 'Content-ID header field in Session Initiation Protocol (SIP)' <draft-ietf-sipcore-content-id-06.txt> as Proposed Standard The IESG plans to make a decision in the next few weeks, and solicits final comments on this action. Please send substantive comments to the ietf@ietf.org mailing lists by 2017-06-27. Exceptionally, comments may be sent to iesg@ietf.org instead. In either case, please retain the beginning of the Subject line to allow automated sorting. Abstract This document specifies the Content-ID header field for usage in the Session Initiation Protocol (SIP). The document also updates RFC 5621, to enable a Content-ID URL to reference a complete message-body and metadata provided by some additional SIP header fields. The file can be obtained via https://datatracker.ietf.org/doc/draft-ietf-sipcore-content-id/ IESG discussion can be tracked via https://datatracker.ietf.org/doc/draft-ietf-sipcore-content-id/ballot/ No IPR declarations have been submitted directly on this I-D.